Pentair Diffuser Set Screw 4-40 x 1-1/8 | IntelliFlo | 071660Z

Description

The Pentair Diffuser Set Screw 4-40 x 1-1/8 (071660Z) is the OEM replacement set screw for the IntelliFlo variable speed pump family, securing the diffuser assembly within the pump’s wet end.

IMPORTANT: QUANTITY REQUIRED PER PUMP
Two (2) of these screws are required per pump. This listing is for one (1) screw. Order two to complete a full service.

IMPORTANT: MODEL REVISION — CHECK YOUR MANUFACTURE DATE
This screw applies to IntelliFlo i1 and i2 pumps manufactured after April 2016, and to IntelliFlo VS+SVRS pumps manufactured after June 2016. Pumps built before these dates use a different diffuser screw. Verify your pump’s manufacture date before ordering.

A missing, stripped, or corroded screw allows the diffuser to shift, reducing hydraulic efficiency and potentially causing internal wear. Replacing worn hardware as part of a wet end service restores correct diffuser alignment and seating.

Specifications

Fits Into

Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment’s manual or on the original part itself before ordering.

Pro Tip

When servicing the IntelliFlo wet end, inspect both diffuser screws together — if one shows corrosion or thread damage, replace both at the same time. Check the threads carefully before reinstalling. Always confirm your pump’s manufacture date against the April 2016 (i1/i2) or June 2016 (VS+SVRS) cutoff before ordering this hardware revision.